# Persulfates

> Compare ammonium, sodium and potassium persulfate for industrial sourcing. Review CAS numbers, applications and three approved technical data sheets.

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Ammonium, sodium and potassium persulfate usually show up together on a sourcing list, yet they aren't the same substance. Check their CAS numbers, typical applications and technical data sheets before choosing the salt and grade your process requires.

## Three salts, one technical comparison

Each of these salts contains the peroxydisulfate ion, which is used in certain polymerization and oxidation reactions. They differ in the counter-ion: ammonium, sodium or potassium. That distinction changes their molecular weights and can affect properties relevant to a formulation. Don't treat a quote for one salt as a quote for another.

The table identifies each salt by its CAS number, formula and molecular weight. It does not show current stock or guarantee a particular grade. Use the linked TDS files for reference, then confirm the specifications of the material actually offered.

| Product | CAS | Formula | Molecular weight |
| --- | --- | --- | --- |
| [Ammonium Persulfate](https://ceysuchem.com/products/persulfates/#ammonium-persulfate) | 7727-54-0 | (NH4)2S2O8 | 228.20 g/mol |
| [Sodium Persulfate](https://ceysuchem.com/products/persulfates/#sodium-persulfate) | 7775-27-1 | Na2S2O8 | 238.09 g/mol |
| [Potassium Persulfate](https://ceysuchem.com/products/persulfates/#potassium-persulfate) | 7727-21-1 | K2S2O8 | 270.32 g/mol |

Chemical identity · 7727-54-0

## Ammonium Persulfate

- **CAS** 7727-54-0
- **Formula** (NH4)2S2O8
- **Molecular weight** 228.20 g/mol

Ammonium persulfate is an inorganic oxidizing salt used in free-radical polymerization and selected etching and cleaning processes. Its applications are often discussed alongside other persulfates, but a change in counter-ion can matter to the formulation, handling and process requirements.

When enquiring about ammonium persulfate, tell us how it will be used and which purity or impurity limits your specification requires. That gives the sourcing team a clear basis for reviewing the grades available.

**Applications to discuss:** Polymerization initiation; selected etching and industrial oxidation processes.

[Read the Ammonium Persulfate Technical Data Sheet (PDF)](https://ceysuchem.com/product-documents/TDS/Ceysu_Ammonium_Persulfate_TDS.pdf) This TDS reproduces published reference data. It is not a CEYSU batch specification or a guarantee of a particular supplied grade.

Chemical identity · 7775-27-1

## Sodium Persulfate

- **CAS** 7775-27-1
- **Formula** Na2S2O8
- **Molecular weight** 238.09 g/mol

Sodium persulfate is a crystalline oxidizing salt used in polymer chemistry, industrial oxidation and some etching or treatment processes. Buyers sometimes compare it with ammonium and potassium persulfate when reviewing an initiator or oxidant system.

If your process specifies sodium persulfate, include the required grade and relevant acceptance limits in your enquiry. The reference TDS helps with the first comparison; the purchase decision should use the specifications for the grade actually offered.

**Applications to discuss:** Industrial polymerization; selected etching and oxidation or treatment applications.

[Read the Sodium Persulfate Technical Data Sheet (PDF)](https://ceysuchem.com/product-documents/TDS/Ceysu_Sodium_Persulfate_TDS.pdf) This TDS reproduces published reference data. It is not a CEYSU batch specification or a guarantee of a particular supplied grade.

Chemical identity · 7727-21-1

## Potassium Persulfate

- **CAS** 7727-21-1
- **Formula** K2S2O8
- **Molecular weight** 270.32 g/mol

Potassium persulfate is another inorganic persulfate oxidizer used in selected polymerization and oxidation applications. It has the same persulfate ion as the ammonium and sodium forms, but should not be treated as an automatic substitute for either.

For potassium persulfate, include the required analytical limits, order volume and delivery destination. Those details help us evaluate technical suitability and commercial requirements against the same specification.

**Applications to discuss:** Selected polymerization initiation and industrial oxidation applications.

[Read the Potassium Persulfate Technical Data Sheet (PDF)](https://ceysuchem.com/product-documents/TDS/Ceysu_Potassium_Persulfate_TDS.pdf) This TDS reproduces published reference data. It is not a CEYSU batch specification or a guarantee of a particular supplied grade.

## Questions buyers ask about persulfates

These questions cover the points buyers often need to resolve before comparing persulfate offers. Reference data can help narrow the choice, but the offered grade's specification should determine whether the material meets your requirements.

What is the difference between ammonium, sodium and potassium persulfate?

All three contain the oxidizing peroxydisulfate ion. The accompanying ammonium, sodium or potassium ion changes the salt's molecular weight and can affect its physical properties. Check the exact chemical and grade in each quotation against your formulation rather than relying on the shared persulfate name.

Can one persulfate replace another in a production process?

Only after a technical review. Different persulfate salts require different masses to supply the same amount of peroxydisulfate ion. Solution preparation and process performance may also change. Have the responsible technical team assess and approve any substitution before using it in production.

Which persulfate is suitable for polymerization?

All three have uses in polymerization, but there is no universal best choice. The formulation, operating conditions and grade requirements determine what is suitable. If your process already names a persulfate salt, start there and compare the available grades against the written specification.

Do you provide a technical data sheet for each of the three products?

Yes. Each of the three salts has its own reference TDS linked in the product section above. These documents are not batch specifications or a guarantee of what will be supplied. Before ordering, ask for the current specification of the offered grade and, where applicable, its Certificate of Analysis.

How can I request Safety Data Sheets (SDS)?

SDS files are not available as public downloads on this site. Contact our team with the exact salt, intended grade and destination so the appropriate safety documentation can be discussed for the material being offered.

What information should be included in an industrial sourcing enquiry?

Start with the exact persulfate salt and CAS number. Add your required grade or analytical limits, the intended application, approximate quantity, packaging and delivery destination. Clear requirements make it easier to evaluate offers on the same basis rather than comparing chemical names alone.

**Documentation and sourcing:** The three reference TDS documents are linked above. Safety Data Sheets are handled by enquiry rather than public download; if you need one, use our [contact page](https://ceysuchem.com/contact-ceysuchem-headquarters/) and include the salt, intended grade and destination. The quotation link is already available in the site's main navigation.

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